Melting of nickel laterite and sulfur-bearing Ni concentrate in making Ni-alloyed iron and stainless steel

摘要

Producing a nickel-alloyed ferrous bath in a refining reactor by charging Ni laterite ore into an iron/slag bath mixture containing a dissolved metalloid and carbon, with a basicity maintained at 1.0-3.0. An oxygen-containing gas is injected into the mixture to oxidise the metalloid and the carbon, and stirred until the ore is melted to form a nickel-alloyed ferrous bath. The slag is then discharged from the reactor, and further gas is injected until the bath is decarburised to a final carbon specification.